# apex vs API

> English confusable word pair

## The two words

### apex
*noun · IPA /ˈeɪ.pɛks/ · frequency rank #10,981*
The highest or the greatest part of something, especially forming a point.

### API
*noun · IPA /ˌeɪˌpiˈaɪ/ · frequency rank #11,501*
Initialism of active pharmaceutical ingredient.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/apex-vs-api